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TIL since the early 1990s, 10% of all electricity consumed in the United States has come from decommissioned Soviet nuclear warheads.

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BoBe TIL Wesley Snipes’ apartment was destroyed by the collapse of the World Trade Center’s Twin Towers. He happened to have been at his daughter’s birth, which he says saved his life.
epR6g TIL that Shark Week has been aired annually on the Discovery Channel every July or August since 1988
gMAZA TIL according to Matt Groening, FOX was never supportive of Futurama, as they moved the show around from time slot to time slot unpredictably for four years, which resulted in poor ratings and its cancellation in 2003. This move left many Futurama fans and production crew shocked and angry.
NX9N TIL candle wicks curve over on purpose. This puts the tip just (and just the tip) in reach of oxygen, effectively trimming the wick.
rNRM1 TIL of sacrificial anodes. They are normally Zinc blocks that are attached to a ships hull. They have a more anodic, i.e. less noble, potential than steel when immersed in sea water, so they corrode away instead of the ships hull it is attached to. Once worn they can then be replaced.